/*
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package aiplatform;

import static com.google.common.truth.Truth.assertThat;
import static junit.framework.TestCase.assertNotNull;

import io.grpc.StatusRuntimeException;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeoutException;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
public class ImportDataSampleTest {

  private static final String PROJECT = System.getenv("UCAIP_PROJECT_ID");
  private static final String DATASET_ID = "000000000000000000000";

  private static final String GCS_SOURCE_URI =
      "gs://automl-cloud-dataset/SMSSpamCollection_train_dataset_2.csv";

  private ByteArrayOutputStream bout;
  private PrintStream out;
  private PrintStream originalPrintStream;

  private static void requireEnvVar(String varName) {
    String errorMessage =
        String.format("Environment variable '%s' is required to perform these tests.", varName);
    assertNotNull(errorMessage, System.getenv(varName));
  }

  @BeforeClass
  public static void checkRequirements() {
    requireEnvVar("GOOGLE_APPLICATION_CREDENTIALS");
    requireEnvVar("UCAIP_PROJECT_ID");
  }

  @Before
  public void setUp() {
    bout = new ByteArrayOutputStream();
    out = new PrintStream(bout);
    originalPrintStream = System.out;
    System.setOut(out);
  }

  @After
  public void tearDown() {
    System.out.flush();
    System.setOut(originalPrintStream);
  }

  @Test
  public void testImportDataSample() throws TimeoutException {
    // As import data into dataset can take a long time, instead try to import data into a
    // nonexistent dataset and confirm that the model was not found, but other
    // elements of the request were valid.
    try {
      ImportDataTextClassificationSingleLabelSample.importDataTextClassificationSingleLabelSample(
          PROJECT, DATASET_ID, GCS_SOURCE_URI);
      // Assert
      String got = bout.toString();
      assertThat(got).contains("The Dataset does not exist.");
    } catch (StatusRuntimeException | ExecutionException | InterruptedException | IOException e) {
      assertThat(e.getMessage()).contains("The Dataset does not exist.");
    }
  }
}
